MANCHESTER UNITED will not take up their chance to sign AS Monaco's Radamel Falcao for £43.5m when his loan deal expires in the summer.

According to reports in France, United have instead set their sights on Paris Saint-Germain striker Edinson Cavani due to Falcao's fitness concerns.

The Colombian target man has been out of action since October after picking up a calf problem in training, missing vital clashes against Chelsea, Manchester City and Arsenal.

Before that, Falcao - who has today returned to first-team training - managed just one goal in five Premier League outings.

The Red Devils' change of heart has put PSG on red alert, and the Ligue 1 champions are willing to offload Cavani in order to land Falcao.

United are long-term admirers of the Uruguay international and boss Louis van Gaal is reportedly readying a £50m move for his services next summer.

Cavani - who has also attracted Arsenal and Liverpool - has been heavily linked with a move away from the Parc des Princes, with manager Laurent Blanc insisting on playing him out of position on the flanks.